http://www.wisconsinrapidstribune.com/VideoNetwork/3682969548001/U-S-Ambassador-to-UN-believes-surface-to-air-missile-brought-down-planehttp://cdn.newslook.com/f7/f750f2b11032e2f46ef04795faf27581/mp4_low/f750f2b11032e2f46ef04795faf27581-mp4_low.mp4http://www.wisconsinrapidstribune.com/VideoNetwork/3682969548001/U-S-Ambassador-to-UN-believes-surface-to-air-missile-brought-down-planehttp://cdn.newslook.com/f7/f750f2b11032e2f46ef04795faf27581/images/frame_ext.jpgU.S. Ambassador to UN believes surface-to-air missile brought down planeThe U.S. says it could not rule out Russian help to separatists in Ukraine in firing missile that likely downed a Malaysian airliner with 298 people on board. Linda So reports.UkraineLinda SonewslookUnited States of AmericaSamantha PowerusWorldRussiaMelbourneMalaysian Airlines01:13